--- /dev/null
+.. Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+..
+.. SPDX-License-Identifier: MPL-2.0
+..
+.. This Source Code Form is subject to the terms of the Mozilla Public
+.. License, v. 2.0. If a copy of the MPL was not distributed with this
+.. file, you can obtain one at https://mozilla.org/MPL/2.0/.
+..
+.. See the COPYRIGHT file distributed with this work for additional
+.. information regarding copyright ownership.
+
+BIND 9.20.19
+------------
+
+Feature Changes
+~~~~~~~~~~~~~~~
+
+- Update requirements for system test suite. ``a2a9b1b878``
+
+ Python 3.10 or newer is now required for running the system test
+ suite. The required python packages and their version requirements are
+ now tracked in `bin/tests/system/requirements.txt`.
+
+ Support for pytest 9.0.0 has been added its minimum supported version
+ has been raised to 7.0.0. The minimum supported dnspython version has
+ been raised to 2.3.0. :gl:`#5690` :gl:`#5614` :gl:`!11469`
+
+- Use enum rather than numbers for isc_base64_tobuffer and
+ isc_hex_tobuffer. ``47b8ca5ac7``
+
+ Use isc_one_or_more and isc_zero_or_more rather than (-2) and (-1)
+ when calling isc_base64_tobuffer. Similarly for isc_hex_tobuffer. This
+ should help reduce the probability that the wrong number is used and
+ it makes the intent clearer. :gl:`#5713` :gl:`!11498`
+
+Bug Fixes
+~~~~~~~~~
+
+- Fix inbound IXFR performance regression. ``318a7535d2``
+
+ Very large inbound IXFR transfers were much slower compared to BIND
+ 9.18. The performance was improved by adding specialized logic to
+ handle IXFR transfers. :gl:`#5442` :gl:`!11355`
+
+- Make catalog zone names and member zones' entry names
+ case-insensitive. ``cd23f0250a``
+
+ Previously, the catalog zone names and their member zones' entry names
+ were unintentionally case-sensitive. This has been fixed. :gl:`#5693`
+ :gl:`!11450`
+
+- Use const pointer with strchr of const pointer. ``736b84ad46``
+
+ :gl:`#5694` :gl:`!11463`
+
+- Fix brid and hhit implementation. ``f73ef3b24f``
+
+ Fix bugs in BRID and HHIT implementation and enable the unit tests.
+ :gl:`#5710` :gl:`!11492`
+
+- DSYNC record incorrectly used two octets for the Scheme Field.
+ ``bd9f73c705``
+
+ When creating the `DSYNC` record from a structure, `uint16_tobuffer`
+ was used instead of `uint8_tobuffer` when adding the scheme, causing a
+ `DSYNC` record that was one octet too long. This has been fixed.
+ :gl:`#5711` :gl:`!11483`
+
+- Fix a possible issue with reponse policy zones and catalog zones.
+ ``3d0823ee68``
+
+ If a response policy zone (RPZ) or a catalog zone contained an
+ `$INCLUDE` directive, then manually reloading that zone could fail to
+ process the changes in the response policy or in the catalog,
+ respectively. This has been fixed. :gl:`#5714` :gl:`!11496`
+
+